The ancient Maya developed a sophisticated calendar system made up of several interlocking cycles, such ______ a 260-day ritual calendar and a 365-day solar calendar. The two cycles realigned only once every 52 years.
Which choice completes the text so that it conforms to the conventions of Standard English?
as:
as,
as;
as
Answer: D
"Such as" leads directly into the examples that follow, so no punctuation should come between "such as" and the list. A colon introduces a list only after a complete independent clause, and "such as" leaves the thought incomplete.
Choice A is tempting because a list follows, but a colon cannot come right after "such as," since the words before it don't form a complete clause.
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